# -*- coding: utf-8 -*-
import RPi.GPIO as GPIO  
import time
import MySQLdb
import sql_test
import threading

def Temprature_send(channel_t):
    channel_t =  16           #引脚号16  
    data = []           #温湿度值  
    j = 0               #计数器  
    t_TH = threading.Timer(60.0*30,Temprature_send, [36])
    t_TH.start()
    #GPIO.setmode(GPIO.BCM)      #以BCM编码格式  
  
    time.sleep(1)           #时延一秒  
  
    GPIO.setup(channel_t, GPIO.OUT)  
  
    GPIO.output(channel_t, GPIO.LOW)  
    time.sleep(0.02)        #给信号提示传感器开始工作  
    GPIO.output(channel_t, GPIO.HIGH)  
  
    GPIO.setup(channel_t, GPIO.IN)  
  
    while GPIO.input(channel_t) == GPIO.LOW:  
        continue  
  
    while GPIO.input(channel_t) == GPIO.HIGH:  
        continue  
  
    while j < 40:  
        k = 0  
        while GPIO.input(channel_t) == GPIO.LOW:  
            continue  
      
        while GPIO.input(channel_t) == GPIO.HIGH:  
            k += 1  
            if k > 100:  
                break  
      
        if k < 8:  
            data.append(0)  
        else:  
            data.append(1)  
  
        j += 1  
  
    print "sensor is working."  
    print data              #输出初始数据高低电平  
  
    humidity_bit = data[0:8]        #分组  
    humidity_point_bit = data[8:16]  
    temperature_bit = data[16:24]  
    temperature_point_bit = data[24:32]  
    check_bit = data[32:40]  
  
    humidity = 0  
    humidity_point = 0  
    temperature = 0  
    temperature_point = 0  
    check = 0  
  
    for i in range(8):  
        humidity += humidity_bit[i] * 2 ** (7 - i)              #转换成十进制数据  
        humidity_point += humidity_point_bit[i] * 2 ** (7 - i)  
        temperature += temperature_bit[i] * 2 ** (7 - i)  
        temperature_point += temperature_point_bit[i] * 2 ** (7 - i)  
        check += check_bit[i] * 2 ** (7 - i)  
  
    tmp = humidity + humidity_point + temperature + temperature_point       #十进制的数据相加  
  
    if check == tmp:                                #数据校验，相等则输出 
        sql_test.Sql_con(temperature, humidity) 
        print "temperature : ", temperature, ", humidity : " , humidity  
    else:                                       #错误输出错误信息，和校验数据  
        print "wrong"  
        print "temperature : ", temperature, ", humidity : " , humidity, " check : ", check, " tmp : ", tmp  
    return 1
    #GPIO.cleanup()                                  #重置针脚  
